Straight lines show the last linear regression channel. The smooth lines show the coordinates of the same channel in the past. This allows you to backtest this strategy using past prices.
It also makes sure that the linear regression channel is useless for the cryptocurrency market :)
Strategy
The limit order to open a long position is on the bottom line (lime color). Limit order to open a short position is on the top line (red). All positions are closed by a limit order when the central line of the channel is crossed (blue). A limit order is also used to close positions.